Liquid-fuel-injecting device.



A. POHL.

LIQUID FUEL INJECTING DEVICE. APPLICATION FILED MAY 22, 1913.

1,128,184. Patented Feb. 9, 1915 THE NORRIS PETERS CD., PHOTC-LITHO, WASHING TON D. C.

ANTON POI-IL, OF ICLElL-GAARDEN', GERMANY, ASSIGNOR T0 FRIED. KRUPP AKTIEN- G-ESELLSCHAFT, GERMANIAWERFT, 0F KIEL-GAARDE1\T, GERMANY.

LIQUID-FUEL-INJECTING DEVICE.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filed May 22, 1913. Serial N 0. 769,227.

To all whom it may concern:

Be it known that I, ANTON POI-IL, a citizen of the German Empire, residing at Kiel-Gaarden, Germany, have invented certain new and useful Improvements in Liquid-Fuel-Injecting Devices, of which the following is a specification.

The present invention relates to device for burning liquid fuel, such as oil, masut or the like for steam boilers, in which the oil under pressure is injected through nozzles in the end walls of the boiler. With this kind of combustion, a jet of combustion gases is formed in front of each nozzle, which jet spreads out in the shape of a cone in the combustion chamber. From experience it has been found, in a tubular boiler for instance, that the water tubes which are directly struck by the spray of burning gases from the nearby nozzles, suffer from considerable corrosion and soon have to be replaced. This disadvantage is avoided in the present invention by a special arrangement of the nozzles.

One embodiment of this invention is illustrated in the accompanying drawing in connection with a tubular boiler and Figure 1 shows a water tube boiler in end elevation with the front wall removed and the nozzles indicated by dot and dash lines and Fig. 2 a section along line 22 of Fig. 1 seen from above.

The water tube boiler comprises an upper drum A and two lower drums B, C, which are connected with the upper drum by the tube nests D, E. The front wall G of the boiler which contains the nozzles F is cylindrically curved, see Fig. 2, and the nozzles are directly radially to the curvature of the front wall G. This curvature of the wall G is such, that the outer surface spray fromthe cone of combustion gases injected by the nozzles situated nearest the tube nests, does not reach the rows of water tubes d and e which lie innermost in the nests, but on the contrary radiates parallel or approximately parallel to these rows of tubes, as will be evident from Fig. 2. Through this arrangement of the nozzles, all injurious corrosion of the inner rows of the water tubes is entirely avoided.

Instead of curving the end wall of the boiler, a straight end wall may be used with the injecting nozzles inserted therein ob- Copies 01 this patent may be obtained for liquely, so that, by suitable inclination of the nozzles the same result is obtained.

The invention is equally well applicable to all systems of boilers and may also be utilized with advantage in fire tube boilers.

I claim 1. Fuel injecting device for steam boilers having side walls running parallelly in horizontal direction, comprising a plurality of injecting nozzles mounted in one of the walls of the boiler, the axes of the nozzles situated nearest the side walls of the boiler to be heated, pointing to a common vertical axis within the boiler so that the outer surface lines of the spray cones from the outer nozzles radiate approximately parallel with each other and with the side walls of the boiler, thereby preventing the spray from coming in direct contact with the said side walls of the boiler.

2. Fuel injecting device for steam boilers having side walls running parallelly in horizontal direction, comprising a plurality of injecting nozzles mounted in one of the walls of the boiler, the axis of each nozzle pointing to a common vertical axis within the boiler so that the outer surface lines of the spray cones from the outermost nozzles radiate approximately parallel with each other and with the side walls of the boiler, thereby preventing the spray from coming in direct contact with the side Walls of the boiler.

3. Fuel injecting device for steam boilers having side walls running parallelly in horizontal direction, comprising a plurality of injecting nozzles mounted in one of the walls of the boiler, the axis of each nozzle pointing to a common vertical axis within the boiler so that the outer surface lines of the spray cones from the outermost nozzles radiate approximately parallel with each other and with the side walls of the boiler, thereby preventing the spray from coming in direct contact with the side walls of the boiler; the wall in which the nozzles are mounted being curved around said common vertical axis.

In testimony whereof I have affixed my signature in presence of two witnesses.

ANTON POHL.

Witnesses:

KARL FRIEDRICH FRENTZEL, HUGO LIEBELT.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

